Hand valve dresser



' sept. 24, 1 929. w, BARBER 1,728,918

HND VALVE DRESSER Filed March 29, 1924 IIIIIIII llll l IIIIII @5% a elf/toman?? s SEQ/1% Patented Sept. 24, 1929 UMTED STATES WILLIAM BARBER, F IBROOIIKILIYN,r NEW YORK HAND VALVE nnnssnn Application filed March 29, 1924. Serial No. 702,721.

This invention relates to improvements in valve-dressers and, in particular, hand-operated valve-dresser. Among the objects of my invention is included simplicity of construction with a corresponding decrease in the cost of production. I also aim to provide a construction of great flexibility which admits of a wide range in positions of the valve holding device to varying positions for side or face grinding. I also provide very simple but efficient tool holding means, whereby a valve is held for dressing or a tool as a reamer may be sharpened and, in either case, may the holding mechanism be quickly assembled or dissembled.

Other objects will appear hereinafter and I attain these results by the construction illustrated in the accompanying drawing, in which- Fig. 1 is a view in elevation;

Fig. 2 is a plan view;

Fig. 3 is a sectional view taken on the line 3 3 of Fig. 2, and

Fig. 4 is a sectional view taken on the line of Fig. 3.

Like numerals refer to similar parts throughout the specification.

I am aware that various forms of poweroperated valve grinders have been constructed, but all of these forms are complicated and are expensive to operate. I have overcome this difficulty by providing an inexpensive and very simple dresser construction which is hand-operated and wherein the tool, or

'e valve, is held in frictional engagement in the chuck bysleeves having very long-tapered bearing surfaces. I also provide in my construction valve holding means which can be adjusted in a wide range of positions for any desired angle of valve grinding or the sharp ening of reamers and other tools.

A specific type of construction which embodies the principles of my invention, is herein disclosed, by way of example, in a broad rather than in a limiting sense. In thisl construction I provide a frame carrying an abrasive element 12 and the tool or valve hold-1 ing` device 13. The abrasive element may be an emery wheel or its equivalent, which is carried on a drive spindle 14. This spindle is seated in a line adjustment sleeve 15 in the frame 10.` A pinion 16 on spindle 14 engages with a drive gear 17 which is operated by the handle 18. A clamp 19 provides means for fastening the device on a work-bench or the like. `The valve and tool holding device is adjustably carried on a table 20 which is supported on the frame 10 by an arm 21. This arm is attached to the frame by a pivot jointl 22 and permits axial adjustment on the pivot bolt 23 to varying positions. A second pivot joint 24, at the end of the arm 21, carries table 20. This table is provided with a slot 25 in which bolt 26 of the tool holding de'- vice or sleeve 13 is held slidably. rIhis slot may be in alignment with the emery wheel in which case the valve 27 is in position for being dressed on its edge 28 in the manner stated below. Y

Within the holding sleeve is rotatively mounted the chuck 29, which is heldin position by a set screw 30 engaging the groove 3l. The chuck is a straight walled tube construction in which fit, from either end, the holding sleeves 32 for receiving and holding the stem 33 of the valve 27. The sleeves are split as is best shown in Fig. 4, and by this means and the very gradual taper, as is best shown in Fig. 3, the stem 33 is centered and firmly held for grinding as the chuck is rotated by means of the handle 34.

From the disclosure thus far given the operation of my device will be readily understood. The tool or valve stem is secured by j the sleeves 32 being pressed into the bore of the holding chuck. The entire assembly is then properly adjusted for either edge or face dressing as may be desired. By means of the handle 18 the grinding wheel is caused to ro- 1 tate while the valve or tool is applied and held in position by aid of a spring 35. As the abrasive member' is rotated, the valve or tool is caused to be rotated on its axis by means of the handle 34 to thereby properly dress the valve-0r a tool if that is the subject of the operation.

The construction herein disclosed not only provides a very economical device, but by its flexibility and independence of the op erating parts means are aorded whereby any part of the valve, or tool, may be given the proper dressing. The assembly of the valve stem and sleeves is quickly made and Without assembling tools.

I-Iaving new decribed my invention What I claim as nevv and useful, of my own invention and desire to be secured by Letters Patent, is:

1. In a valve dressing mechanism, the combination of an abrasive member and a valve holding member, a handle for each of said members 'for at Will rotating the same independently, a frame for said abrasive member, an arm extending laterally from said frame formed with an. L-eXtension, and a pivot connection between said arm eX- tension and said L-extension, a table on said L-extension, said table having a slot in which the holding member is slidably and pivotally mounted, and a spring for tensioning said holding member in a given position.

2. In a valve dressing i mechanism, the combination oi: an abrasive member and a valve holding' member, a frame for supporting said abrasive member, said frame having an extension, an L-arm pivotally mounted on said extension and extending therefrom beyond the abrasive member, a supporting table on one end of said L-arm, said table having a slot for the valve holding member lying in a plane parallel to the face of the abrasive member, and means on said holding member for slidably and rotatably supporting said holding member.

3. In a valve dressing mechanism, a holding member comprising a tubing having a projection for pivotally and slidably mounting said tubing and a table having an elongated slot in vvhiel said projection is mounted, a sleeve rotatably held Within said tubing, tapered expansion members fitting in said sleeve from opposite sides for engaging the stem of a valve or tool and a handle on said sleeve for rotating the same.

In testimony whereof I have hereunto set my hand on this 28th day of March,

WILLIAM BARBER. 

